72 results about "Traffic noise" patented technology

The invention provides a production method of a road sound barrier with light weight, high strength, corrosion resistance and strong sound absorption, and belongs to the technical field of road sound barriers, the production method comprises the following steps: collecting a traffic noise sample by using a high-precision microphone array, extracting noise spectrum characteristics by using a Noi seSpecNet model, and determining that the main noise frequency band is 500-4000 Hz; optimal perforation parameters are calculated through the model; accurately perforating the UHPC board according to the optimized parameters; the perforated UHPC board, basalt fiber cloth, a through-hole ceramic board, a sound insulation felt and other materials are bonded according to the sequence and technology to form a multi-layer composite structure; curing and curing in a constant-temperature and constant-humidity environment; carrying out acoustic performance testing; and finally, the qualified sound barrier unit is installed on a foundation structure and subjected to protection treatment. According to the method, the technical problem that a road sound barrier in the prior art is difficult to realize efficient sound absorption for traffic noise of a specific frequency band is solved.

The invention discloses an intelligent low-altitude traffic unmanned aerial vehicle situation awareness method and system. The method comprises the steps of image acquisition, perception enhancement border crossing sample generation, boundary distance analysis feature extraction unit design, dynamic cross-specification air situation fusion, airspace anti-change loss calibration, unmanned aerial vehicle situation awareness model design and low-altitude traffic unmanned aerial vehicle situation awareness. The invention belongs to the field of image processing, and particularly relates to an intelligent low-altitude traffic unmanned aerial vehicle situation awareness method and system.According to the scheme, texture constraint loss is constructed, and situation misjudgment caused by detail loss is reduced; based on boundary distance analysis operation, separating low-altitude traffic noise and target features; based on height attitude self-adaptive pooling size design, feature mismatching is avoided; introducing a motion speed compensation factor to correct frame offset caused by high-speed flight of the low-altitude unmanned aerial vehicle; a dynamic noise suppression coefficient is introduced to suppress harmful gradient interference; and the low-altitude traffic unmanned aerial vehicle situation awareness effect is further improved.

The utility model discloses a limiting device for track noise detection, which relates to the technical field of track traffic noise detection and comprises a square mounting frame. The two mounting plates are symmetrically arranged on the mounting frame, and the two mounting plates are connected with the mounting frame in a sliding and locking mode; two first limiting mechanisms; two clamping jaw parts; and two second limiting mechanisms. According to the utility model, firstly, the detected track is supported by the second limiting mechanism to ensure that the detected track is in a horizontal detection position, and then the detected track is limited and fixed by the first limiting mechanism and the clamping jaw part, so that the connection condition between the clamping jaw part and the detected track can be observed; whether the detected track is flat and qualified or not is preliminarily observed, and then levelness detection is conducted on the detected track through flatness detection equipment. The purpose of detecting the flatness of the surface of the track is achieved.

The invention relates to the technical field of municipal roads, in particular to an urban road multifunctional environment-friendly noise-reducing pavement material and a preparation method thereof.The urban road multifunctional environment-friendly noise-reducing pavement material comprises a noise-reducing pavement body, and the noise-reducing pavement body comprises a drainage base layer, a bearing base layer, a bonding layer, a wearing layer and a noise-reducing aggregate layer; the bearing base layer is laid on the top of the drainage base layer, the bonding layer is bonded to the top of the bearing base layer, the wearing layer is bonded to the top of the bonding layer, and the noise reduction aggregate layer is laid on the top of the wearing layer; the rubber particles are added into the noise reduction aggregate layer, so that the pavement can effectively consume sound energy in various modes of sound wave absorption, reflection, scattering and the like in the vehicle driving process, the overall noise reduction capability of the pavement material is improved, the noise reduction function is realized, and the interference of traffic noise to people such as residents, students and patients is greatly reduced.

The utility model relates to the technical field of soundproof windows, in particular to a multilayer soundproof structure of a hollow soundproof shielding window, which comprises a frame, an outer glass plate, a middle glass plate and an inner glass plate are sequentially arranged in the frame from back to front, and a first hollow cavity is arranged between the outer glass plate and the middle glass plate. A second hollow cavity is formed between the middle glass plate and the inner glass plate, the opposite side faces of the outer glass plate and the inner glass plate are each provided with a flexible damping coating, and the front side and the rear side of the middle glass plate are each provided with a flexible damping coating. According to the multi-layer sound insulation structure of the hollow sound insulation shielding window, by means of the design that the multi-layer glass plate structure, the flexible damping coating and the hollow cavity are filled with inert gas, noise can be effectively blocked, the full-band sound insulation effect is achieved, and especially for low-frequency roars in traffic noise and medium-high-frequency sharp noise generated by industrial equipment, the sound insulation effect is good. The remarkable shielding capability is provided, and the requirement of modern buildings for high sound insulation performance is met.

The present application relates to sound insulation equipment technical field, more specifically, it relates to a kind of full-closed sound barrier based on building energy-saving sound insulation material board, comprising: building energy-saving sound insulation material board, door type steel frame structure and self-starting smoke outlet structure;Building energy-saving sound insulation material board is equipped with multiple, multiple building energy-saving sound insulation material board is respectively installed in the side and top of door type steel frame structure;Self-starting smoke outlet structure is closed and installed in the normally closed smoke outlet of door type steel frame structure;When the fire occurs in the full-closed sound barrier and produces a lot of smoke, self-starting smoke outlet structure removes the plugging of normally closed smoke outlet.The present application uses building energy-saving sound insulation material board and door type steel frame structure to cooperate as enclosure structure, effectively reduce traffic noise;Self-starting smoke outlet structure is also installed, effectively ensure the use safety under emergency state.

The invention discloses an indoor noise active control method in an urban traffic environment based on a Wiener algorithm and a related device, and relates to the technical field of indoor noise control, and the method comprises the steps: collecting a plurality of groups of indoor steady-state noise data mainly containing traffic noise through a reference microphone and an error microphone; relying on the steady-state characteristic of the noise, adopting a Wiener algorithm to carry out offline solving to obtain an optimal filter parameter; and finally, taking the optimal parameter as a filter parameter of an indoor noise controller, and applying the optimal parameter to an active control system to reduce the noise of an area to be subjected to noise reduction. According to the scheme, the problem that conventional hardware is difficult to update coefficients in real time in a 1-3ms low-delay scene of adaptive algorithms such as FxLMS and the like is effectively solved, and adaptation can be realized without upgrading the hardware; according to the method, the overall noise reduction of 2-2.5 dB (A) can be realized in the frequency band of 50-1000 Hz, the noise reduction amount of a peak frequency point exceeds 10 dB (A), parameters are adaptive to noise in different time periods, the generalization is good, and the indoor traffic noise control requirement is practically met.

The present invention relates to the fields of urban traffic noise control and photovoltaic intelligent control technology, and discloses a louver-type intelligent photovoltaic noise reduction device for a fully enclosed sound barrier, comprising: a transverse short metal frame and a longitudinal tall metal frame; and a noise reduction mechanism disposed on a side opposite the longitudinal tall metal frame. The present invention rotates a metal base plate, thereby squeezing gas within a rotating shaft into an airbag. The airbag's expansion fills the interior of the silencer's internal cavity with sound-absorbing material, thereby achieving an intelligently controlled, fully enclosed sound barrier multifunctional fire smoke exhaust vent noise reduction device. This device avoids noise transmission gaps and window periods in a semi-open state, achieving a good noise reduction effect while also reducing the amount of sound-absorbing material used, ensuring both noise reduction and cost savings.

The utility model discloses a partition backdrop glass sound insulation plate which comprises a sound insulation plate assembly. The sound insulation board assembly comprises a sound insulation board outer frame, a sound insulation board inner frame arranged on the inner side of the sound insulation board outer frame, a sound insulation glass plate arranged on the inner side of the sound insulation board inner frame, an electrochromic material layer covering the interior of the sound insulation glass plate, an electric wire led into the sound insulation board outer frame and a round hole formed in the bottom face of the sound insulation board outer frame. The electric male connector is connected to the tail end of the electric wire, and the electric female connector is arranged on the inner frame of the sound insulation plate. Through the arrangement of the sound insulation plate assembly, the glass sound insulation plate and the electrochromism are combined, the color of the electrochromism material layer can be changed by adjusting voltage, and therefore the color change of the sound insulation plate is controlled externally, urban landscape can be changed, and a comfortable visual environment can be provided for pedestrians; and the sound insulation effect can be achieved, and the influence of traffic noise on surrounding residents is effectively reduced.

The present invention belongs to the technical field of measurement devices and provides a road traffic noise monitoring device, system, and method for using the same. The monitoring device comprises: a frame having three closed sides and one open side, and a plate having one end hinged to one end of the frame and the other end detachably connected to the other end of the frame; a sound level meter detachably mounted on the exterior of the frame; a crawling device, one mounted on each of the three side walls of the frame and the plate, with multiple crawling devices acting together on a longitudinally extending tubular object to enable the frame to be raised and lowered on the tubular object; a control module for controlling the operation of the crawling devices; and a battery module for powering the crawling devices and the control module. The present invention eliminates the need for full staff participation in monitoring, thereby reducing labor costs.

The invention relates to the technical field of building boards, in particular to a sound absorption and decoration integrated board. The sound transmission surface layer, the sound absorption layer and the resonance noise reduction layer are sequentially bonded from outside to inside, the sound transmission surface layer is a microporous aluminum plate, and the resonance noise reduction layer is a honeycomb core material. The multi-stage composite sound absorption device is reasonable in structural design, adopts a mode of combining sound transmission, sound absorption and resonance to form a multi-stage composite sound absorption system so as to effectively destroy noise propagation, can use noise with different wavelengths, effectively avoids noise such as wind noise, mechanical noise, traffic noise and high-altitude noise, guarantees indoor quietness, and is suitable for popularization and application. The noise eliminating effect is really achieved, and the problems existing in the prior art are solved.

The invention belongs to the technical field of noise control, discloses a prediction optimization method for a traffic noise exposure level in a residential quarter, and is mainly used for solving the problem that the traffic noise exposure level in the residential quarter cannot be predicted and optimized from the planning and design level of the residential quarter. According to the method, a sound environment simulation model is established, statistical analysis is performed on form factors of existing residential quarters and internal sound environment parameters of the residential quarters based on urban road noise sources, and form factors influencing the internal traffic noise exposure level of the residential quarters are extracted; a sound environment prediction model based on the form factors of the residential quarter is constructed through regression analysis, direct correspondence between the design parameters of the residential quarter and the sound environment parameters is achieved, and the sound environment parameters in the residential quarter can be rapidly calculated through the form factors of the residential quarter in the planning and design stage of the residential quarter; the method can play a good role in assisting the planning and design of the residential quarter, and facilitates the timely adjustment of the design scheme of the residential quarter.

A method for fine-grained traffic noise prediction includes obtaining location data indicating one or more locations and, for each respective location of the one or more locations, location-specific traffic data. The method includes, for each respective location of the one or more locations, using various computational models to predict a vehicle count and a vehicle class mix for the respective location; calculating, based on the predicted vehicle count and the predicted vehicle class mix, a number of vehicles per vehicle class for the respective location; and calculating, based on the number of vehicles per vehicle class, a predicted noise level for the respective location. The method includes causing a client device to display a map. The map may include, for each location of the one or more locations, a visual indication of the predicted noise level for the respective location.

The utility model discloses a pavement structure of a non-expansion joint low-noise bridge floor, which sequentially comprises a stable layer, a waterproof crack-inhibiting layer, a sliding layer, a middle surface layer and an upper surface layer from bottom to top, each layer is a continuous pavement layer, and the surface is non-expansion joint; a gap is formed between the beam body and the bridge abutment, and an anti-leakage net is arranged at the one-third depth position of the gap; a first arc is arranged between the gap and the abutment, the circle center corresponding to the first arc and the leakage-proof net are located on the same horizontal line, the central angle corresponding to the first arc is 90 degrees, and the radius of the corresponding circle is one third of the depth of the gap; a second arc is arranged between the gap and the beam body, the circle center corresponding to the second arc and the leakage-proof net are located on the same horizontal line, and the circle radius corresponding to the second arc is two thirds of the depth of the gap. According to the bridge deck pavement structure, the asphalt mixture is paved in a continuous through paving mode, no expansion joint exists in the whole structure and all layers of structures, the bridge deck pavement can reduce traffic noise, and the problem that the bridge deck pavement is high in noise is solved.

The invention discloses a multilevel active wave interference noise reduction optimization method and system for an expressway. The method comprises the steps that an acoustic sensor collects and preprocesses space-time sequence acoustic data; encoding and fusing the time sequence characteristics and the space characteristics of the double-flow Transform encoder; calculating and generating an active wave interference control signal, and distributing the active wave interference control signal to an active wave interference device; collecting noise reduction effect feedback data, and optimizing parameters by using a snake vulture optimization algorithm; the optimized parameter closed loop is applied to noise reduction control, and continuous self-adaptive optimization is achieved. According to the invention, efficient self-adaptive active noise reduction and continuous optimization control of multi-level and wide-frequency-band traffic noise of the expressway are realized.

The utility model provides a near-rail double-sided super-structure sound-absorbing barrier, which comprises a super-structure sound-absorbing module, a shell and a base, the shell and the base are used for packaging the super-structure sound-absorbing module, and the super-structure sound-absorbing module comprises one or more super-structure sound-absorbing low-frequency modules and one or more super-structure sound-absorbing high-frequency modules. The super-structure sound absorption module is of a multi-Helmholtz resonance sound absorption structure, has a double-face sound absorption function and can efficiently absorb noise on the two sides of the track at the same time. Compared with a traditional sound barrier, the sound barrier can limit wheeltrack noise at the bottom of a train, absorbs and dissipates the noise through the super-structure sound absorption material, and especially for wheeltrack noise generated by a far-rail train, compared with a traditional sound barrier arranged at a bridge curtain board, the sound barrier cannot limit the wheeltrack noise to be diffused outwards; the noise reduction effect is remarkably improved through the near-rail sound barrier arranged between the double lines, the acoustic environment around the rail is effectively improved, and an innovative solution is provided for reducing the influence of traffic noise on the surrounding environment.

The application discloses a sound source sound intensity estimation method, device and equipment and a computer readable storage medium. The method comprises the following steps: positioning the angle of a vehicle sound source relative to a microphone array based on sound signals collected by the microphone array and video data collected by a camera device; calculating the distance between the vehicle sound source and the microphone array according to the angle of the vehicle sound source relative to the microphone array and the installation position information of the microphone array; and calculating the sound intensity data at the vehicle sound source according to the distance and the intensity data of the sound signals of the vehicle sound source collected by the microphone array. The application improves the accuracy of the estimated noise intensity of the vehicle sound source, thereby improving the monitoring and management accuracy of traffic noise.

The application discloses a road traffic noise crowd influence measurement method based on mobile phone signaling data, and the method comprises the following steps: acquiring mobile phone signaling data, determining the space-time distribution information of mobile phone signaling users, estimating the actual population space-time distribution according to the space-time distribution information of mobile phone signaling users and local population census data, calculating the residence time of users staying at each base station position according to the population age attribute in the mobile phone signaling data and the population activity characteristics in the actual population space-time distribution, and then determining a target data set; combining the hourly traffic noise map of the city to obtain the hourly traffic noise equivalent sound level of the coverage range of each base station, and calculating the road traffic noise continuous exposure intensity of the target crowd according to the target data set and the traffic noise equivalent sound level. The application has high accuracy and can be widely applied to the field of computer technology.

The present application relates to sound insulation equipment technical field, more specifically, it relates to a kind of full-closed sound barrier based on building energy-saving sound insulation material board, comprising: building energy-saving sound insulation material board, door type steel frame structure and self-starting smoke outlet structure;Building energy-saving sound insulation material board is equipped with multiple, multiple building energy-saving sound insulation material board is respectively installed in the side and top of door type steel frame structure;Self-starting smoke outlet structure is closed and installed in the normally closed smoke outlet of door type steel frame structure;When the fire occurs in the full-closed sound barrier and produces a lot of smoke, self-starting smoke outlet structure removes the plugging of normally closed smoke outlet.The present application uses building energy-saving sound insulation material board and door type steel frame structure as a containment structure, effectively reduces traffic noise;Self-starting smoke outlet structure is also installed, effectively ensures the use safety under emergency state.

The invention discloses a DAS-based building attachment state monitoring and falling object early warning method and system, and relates to the technical field of building safety monitoring, and the method comprises the steps: collecting a global acoustic vibration signal of a building attachment through employing a laid distributed acoustic sensing optical fiber; the global acoustic vibration signals are separated into different modal components, after the modal components corresponding to the environmental noise are removed, the modal components corresponding to the traffic noise and the personnel activity noise are superposed to serve as reference signals, and after the reference signals are filtered through adaptive weights, defect characteristic signals of the building attachments are determined; and judging whether the defect characteristic signal is a suspected defect event based on a modal frequency change rate and a short-time pulse characteristic, if so, extracting a multi-dimensional characteristic parameter, determining a defect level according to the trained evaluation model, and positioning a defect position according to an optical fiber laying scheme. Therefore, attachment global non-blind area monitoring is realized, and the comprehensiveness, accuracy and timeliness of building safety monitoring are improved.

The invention discloses a noise reduction method for traffic noise and a road sound barrier system. The method comprises the following steps: acquiring speed information of a target vehicle on a target road; a target control instruction set is generated based on the speed information, the target control instruction set is used for controlling a noise reduction mode of the road sound barrier system and adjusting working parameters of an adaptive filter, and the noise reduction mode comprises at least one of an engine order noise tracking mode, a tire noise broadband suppression mode and a Doppler effect compensation mode; the working parameters comprise at least one of filter step length and filter length. The technical problem that an existing traffic noise reduction method is poor in effect is solved.

The utility model discloses a portable highway traffic noise monitoring device, which comprises a vertical cylinder and a lifting rod, the lifting rod is inserted into the top surface of the vertical cylinder in a penetrating manner, a piston is fixedly mounted on the bottom surface of the lifting rod, and a top box is fixedly mounted on the top surface of the lifting rod. The device has the beneficial effects that the pedal inflator pump and the air release valve are adopted, a worker can fix the device on one side of the highway guardrail through the clamping groove, then, the pedal inflator pump can be treaded, gas is injected into the vertical cylinder, the gas pushes the piston to move upwards, the top box can be pushed to move upwards, and rapid deployment and installation are completed; the highway noise enters the top box after being received by the horn mouth, the decibel meter detects the noise, when the device is folded, the device can be rapidly folded only by opening the air release valve and exhausting air in the vertical cylinder, the height of the folded device is reduced, carrying is convenient, and compared with a traditional height adjusting structure, the device is more convenient to adjust the height, and the practicability is high. The folding is very fast and convenient, and the use convenience is improved.

The utility model discloses an active type composite energy -conserving vertical sound type barrier, including composite screen body, the flexible photovoltaic board of laying in the outside surface of composite screen body, at least one sound intensity sensor, the impulse ultrasonic generator for generating and emitting ultrasonic wave of eliminating noise, power supply circuit and control unit. The utility model takes ultrasonic generator active mode and carries out the noise reduction, satisfies the requirement of sensitive area noise value, integrates the flexible photovoltaic board on the surface of composite screen body, utilizes solar energy and has realized the energy self -sufficiency of system, the composite screen body of upper portion inwardly inclined will most traffic noise reflect back road area, improves the noise reduction effect and can make flexible photovoltaic board maximum receive solar radiation, provides more electric energy, the intensity and frequency spectrum of two sound intensity sensor noise value, adjusts the emission angle and frequency of impulse ultrasonic generator and other working parameters, realizes more accurate, efficient directional noise elimination.

The invention discloses a sound barrier regulation and control system and a control method thereof, and belongs to the technical field of traffic noise abatement, the system is divided into a plurality of independent control sections along the length direction of a sound barrier, and each section is integrated with an environment detection unit, an execution unit, an inclination angle adjustable sound insulation plate, a lifting type sound absorption module, an electromagnetic valve drainage group and a section controller. The central controller evaluates rainstorm, strong wind and noise threat levels in real time based on a dynamic threat value model, triggers a single-factor, double-factor composite or three-factor comprehensive protection mode, adjusts the wind load of the sound insulation board through an asymmetric dip angle strategy, activates and enhances high-frequency sound absorption through a micro-perforated array, and jointly verifies false triggering prevention drainage through three sections. The system suppresses instantaneous interference through moving average filtering, supports parameter adaptive updating and daily automatic calibration, and is suitable for scenes such as high-speed rails and expressways.

The invention provides a performance bottleneck diagnosis method and device, and belongs to the technical field of micro-services. According to the method, the key performance index reflecting the operation health state of the micro-service is utilized to evaluate the operation health state of the micro-service, and when the exception is found, the traffic mirroring strategy corresponding to the abnormal micro-service is determined. The traffic mirroring strategy is used for acquiring the mirroring traffic of the abnormal micro-service. According to the on-demand mirroring strategy, only when the performance bottleneck is detected, mirroring sampling is carried out on the flow of the abnormal micro-service causing the performance bottleneck, and compared with collection of full-amount logs or fixed-proportion logs, the sampling data size can be remarkably reduced, and therefore the storage cost and the calculation cost are reduced. And in the mode, mirror image sampling is only carried out on the traffic of the abnormal micro-service, so that normal traffic noise data can be reduced from the source, the noise influence is avoided, and the positioning efficiency and the positioning precision of the performance bottleneck root cause are improved.

The utility model discloses a noise barrier plate, and relates to the technical field of road engineering. The noise barrier plate comprises a sound absorption layer and a sound insulation layer, the sound absorption layer comprises a first sound absorption layer and a second sound absorption layer, the first sound absorption layer is arranged on one side of the second sound absorption layer, and the porosity of the material of the first sound absorption layer is smaller than that of the material of the second sound absorption layer; the sound insulation layer is arranged on the side, away from the first sound absorption layer, of the second sound absorption layer, a plurality of through cavities are formed in the sound insulation layer in the first direction, the sound absorption layers can effectively absorb and absorb traffic noise, the sound insulation layer can block propagation of the noise, and due to the arrangement of the cavities, the cavity resonance effect can be improved, and the propagation of the noise can be blocked.

The utility model discloses a sound absorption barrier of flower shape structure, including screen body, and the sound absorption component of uniform distribution on screen body, and the sound absorption component includes first noise reduction part and second noise reduction part, the outer peripheral surface of first noise reduction part is equipped with several consistent sharp corners, and is surrounded in first noise reduction part outside through a plurality of sharp corners, first noise reduction part and second noise reduction part are evenly distributed on the length direction of screen body, and second noise reduction part is located the below of first noise reduction part. Above all, through the screen body surface formation sound absorption component, and two noise reduction parts on sound absorption component can absorb traffic noise, specifically, utilize two noise reduction parts and the mutual cooperation of sharp corner, can reduce its overall energy to the multiple interference effect of alternating reflection and scattering of traffic noise on the screen body surface, so that the equipment can utilize self structure to complete the absorption and reduction of noise. Have based on this, the utility model is worth promoting and application.

The invention discloses a traffic road photovoltaic sound insulation wall which comprises a base fixedly mounted on a road foundation pier; the bottoms of the vertical columns are fixed to the base and are arranged at intervals in the left-right direction; the left ends and the right ends of the connecting pieces are connected to the two adjacent vertical columns respectively, and the connecting pieces are vertically arranged; the photovoltaic modules are connected to the front side of the connecting piece and are vertically arranged; the sound insulation plate is connected to the rear side of the connecting piece; and the fastener is connected to the connecting piece and is used for fixing the photovoltaic module and the sound insulation plate. The photovoltaic module is connected to the front side of the connecting piece, sunlight can be effectively utilized for power generation, and traffic noise can be reduced. The sound insulation plate is connected to the rear side of the connecting piece, and the sound insulation effect is further enhanced. The fastener can realize the installation and fixation of the photovoltaic module and the sound insulation plate at the same time, so that the photovoltaic module and the sound insulation plate can be installed and fixed without independently arranging the fasteners, the number of the fasteners can be effectively reduced, and the installation steps are simplified.

The present invention provides a unit plate type sound barrier interferometer and the sound barrier composed of the same, which belongs to the technical field of environmental noise and traffic noise control. The unit plate type sound barrier interferometer comprises a back plate and a panel, wherein a holding cavity for holding the sound wave interferometer is formed between the back plate and the panel; the sound wave interferometer comprises a bottom plate, wherein a sound wave interference device is arranged on the bottom plate, and the sound wave interference device is composed of sound wave diffusion units arranged with different periodicities, and the sound wave diffusion units arranged with different periodicities are composed of a group of acoustic element blocks arranged according to a two-dimensional quadratic residue law, and the acoustic element blocks form a two-dimensional tic-tac-toe structure with different depths, thereby changing the sound absorption frequency of the sound wave diffusion unit; the present invention is designed with a sound wave interference device, which is arranged according to a two-dimensional quadratic residue law, and can have excellent sound absorption and diffusion performance for noises of different frequencies.

The utility model discloses a polygonal structure interference type acoustic board which comprises a screen body, and a first sound absorption area and a second sound absorption area are arranged on the face, facing the sound source side, of the screen body. The first sound absorption area protrudes out of the outer wall face of the screen body, and the second sound absorption area is sunken towards the interior of the screen body. The cross sections of the first sound absorption areas and the cross sections of the second sound absorption areas are both polygonal, and the number of the first sound absorption areas and the number of the second sound absorption areas are both multiple. The first sound absorption areas are distributed on the screen body at equal intervals, and the second sound absorption areas are distributed below the first sound absorption areas at equal intervals. The polygonal concave-convex structure is formed on the surface of the screen body, so that the total energy of traffic noise is reduced through multiple interference effects of alternate reflection and scattering of the traffic noise on the surface of the screen body, and the equipment can absorb and reduce the noise by utilizing the structure of the equipment; according to the screen body, the concave-convex structure is used for replacing the situation that the existing sound absorption equipment needs to be filled with porous materials, and then the sound absorption function can be achieved.